Bulb-stenciling device.



0. WINSTON. BULB STENCILING DEVICE.

APPLICATION FILED DEC- l. I916.

Patentd Mar. 5, 1918.

//VVL -'N TOE Over/an mnsfian BY HIGATTOPNEYS GVERTON WINS-291$, OFMINNEAPOLIS, MINNESOTA.

BULB-STEHCILING DEVICE.

Specification oi Letters Patent.

Patented Mar. 5, 1918.

Application filed December 1, 1918. Serial No. 134,288.

To all whom it may concern:

Be it known that I, OVERTON WINSTON, a citizen of the United States,residing at Minneapolis, in the county of Hennepm and State ofMinnesota, have invented certain -b new and useful Improvements inBulb-Stenciling Devices; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as Wlll enableothers skilled in the art to which it appertains to make and use thesame.

My invention has for its object to provide an extremely simple andhighly efiicient stenciling device for use in accurately, quickly andeconomically a plying to electric light bulbs, or the like, rosting orlight dimming surfaces. The stenciling device of the present applicationis in the nature of a modification of or improvement on thestencilingdevice disclosed and broadly claimed in my companionapplication S. .L 133,473, filed of date November 25th, 1916, andentitled Bulb stenciling device.

Generally stated, the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

It has been found desirable to provide frosted or dimmed surfaces orzones of various different shapes at proper precalculated places on theglobes of electric light bulbs which are to be used in headlights onautomobiles and similar vehicles, and my invention provides an extremelysimple and efficient device for this purpose.

In the accompanying drawings which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a bottom plan view of the improved stenciling device;

Fig. 2 is a vertical section on the line 22 of Fig. 1;

Fig. 3 is a transverse section on the line 3 3 of Fig. 1;

Fig. 4 is a fragmentary section on the line 4-4 of Fig. 2; and

Fig. 5 is a fragmentary view partly in side elevation and partly invertical section showing a portion of the bulb and a portion of thesocket member of the stenciling device.

The body or socketv member of the stenoiling device which is indicated,as an entirety, by the numeral 6, is intended to be rigidly secured toa. suitable support, not shown, and it is formed with a vertical passage7, which, at 8, joins a concave bulb seat 9 that flares toward and opensat the bottom of the said socket member. In spherical light bulbs, thepassage 7 should e approximately cylindrical and the bearmg shoulder 8should also be a true circle except atits extreme front, where it isslightly indented, so that the light bulb,

when seated against the same, will have continuous contact therewith,but will not have contact with the flaring walls of the pocket 9.

The stencil plate 10, in this form of the dGVlCQ, 1s a rigid structure,being preferably a casting, and it is of an approximately spherical formhaving, at one side, an upwardly extended hood 11, and having at itsother side, a hinge lug 12, which latter is loosely connected by a hingepin 13, to laterally spaced lugs 14 on the bottom of the socket member6.

In this lower or bottom portion, the stencil plate 10 is formed withstencil openings 15 and 16, the margins of which are formed by sharpedges which, alone, engage the bottom of the electric light bulb. Theglobe of this electric light bulb is indicated by the numeral 17, andits shank by the numeral 18, the latter having the customarydiametrically projecting lock lugs 19. The ma n inner surface of thestencil plate 10, as is clearly shown in Fig. 2, stands conslderablyaway from the surface of the light bulb. Alined with the tip 17 of thelight bulb. globe, the stencil plate 10 is formed w th a depressedpocket 20 that is formed with a rim projected within the concave lnnersurface of the stencil plate but not into contact with the bulb globe.In front of the stencil opening 16, the stencil plate 10' is providedwith a segmental trough or depression 21 which has perforations or drainpassages 22 and 23, all for a purpose which will presently appear.

The trough or depression between the two stencil openings 15 and 16 isprovided with a drain passage 24, and the depression or trough betweenthe stencil opening 15 and rim of the pocket 17 has a drain passage 26.The purpose of these drain passages will presently appear.

At the intermediate portions of its sides, the stencil .plate 10 isprovided with outstanding lugs 27 that are attached to the lower ends ofcoiled springs 28, the upper ends of which are anchored to ears 29 onthe sides of the socket member 6.

- the glass or the bulb, may

By reference to Fig. 2, it will be noted that the under surface of thesocket member 6 is concave end that directly en ages the shank of thebulb. The free end 0 this spring 31 terminates inward of the lugs 19 ofthe bulb shank so that the bulb may be freely rotated while it is held,as shown in Fig. 2. The sides of the hood are cut away so that the bulbshank may be engaged by the fingers while held, as shown in Fig. 2. Itwill be further noted that the sprmgs 28 exert a force that is at aright angle to the plane of the socket ledge 8, and it will be furtherobserved by reference I articularly to Fig. 1, that the hm e lug 12 asplay on the hinge pin 13 and etween the lugs 14 so that the stencilplate is free for limited lateral and forward and rearward movements toadapt itself to the surface of the light bulb, when the latter isspring-pressed against the ledge 8. a

In its front portion, the socket member 6 is rovided with a peek hole 32that extends radially toward the axis of the bulb, and which enables anobserver lookin throu h the same, to note the exact position of t efilament of the light bulb, and hence will rotate the bulb until itsfilament is properly positioned in respect to the stencil openings 15and 16. This is especially important when' the frostings are to be aplied to an electric light bulb having two fi aments, or even onefilament that is extended. transversely of the axis of the bulb.

When the bulb is applied and held in the stenciling device, as shown inFig. 2, those portions thereof that may be seen through the stencilopenings 15 and-16, are exposed so that by means of a brush, orotherwise, an acid or other material which will produce a frosting orlight dimming eifect on be applied through the said stencil openings,and thus roduce frostings or light dimming surfhces having the form ofsaid stencil openings. This device is. also well adapted to hold a bulbwhile a frosting or ground glass effect is produced by means of a sandblast blown through the said stencil openings.

Then the acid is .applied, as above described, some thereof may leadpast the sharp marginal edges of the stencil openings and into thecavities of the concave stencil plate 10, but any liquid thus leakingmay run out again immediately through the ,2 and drain passages 22, 24and 26. When the stencil plate is lowered by application of a finger tothe finger piece 33, any further acid or liquid remaining in the cavityof the stencil plane finds its ready escape through the drain passage23.

The pocket 20 serves roughly as a means for primarily positioning thebulb within the concave stencil plate 10. After the bulb has beenfrosted and the stencil plate 10 is removed downward to release thebulb, the sprin 31 tends to .rock the bulb and would ten to produce ascraping action between the bulb and the sharp marginal edges of thestencil openings 15 and 16. This, however, is prevented by a lightfolded leaf spring 34 (see particularly Figs. This spring is preferablybent upon itself, has one end rigidly anchored to the bottom of thestencil late between the openings 15 and-16, and as a-curved free endportion that engages the bottom of the bulb, and not only tends to keepthe bulb centered laterally, but serves to raise the bulb out ofengagement with the sharp edges of the stencil openings 15 and 16, theinstant that pressure is removed therefrom by the downward movement ofthe stencil plate.

What I claim is:

1. A bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being a rigid structure havina stencil opening with inturned edges or engagement with the globe of alight bulb held between said socket member and stencil plate, and thesaid stencil plate having a pocket adapted to loosely receive a portionof the bulb.

2. A bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being a rigid structure havinga stencil openin with inturned ed es for enga ement with the globe of aligl it bulb held etween said socket member and stencil plate, saidstencil plate having a projecting shank receiving hood and a spring insaid hood engageable with the shank of the li ht bulb to press the sameagainst a lower edge portion of said socket member.

3. A bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being a rigid structure having.a stencil opening with inturned edges for engagement with the globe ofa light bulb held between said socket member and stencil plate, saidstencil plate having a projecting shank receiving hood and a spring insaid hood engageable with the shank of the light bulb to press the sameagainst a lower edge portion of said socket member, the said socketmember having a concave seat receiving the shank thus pressed againstthe same.

4. A bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being a rigid structure havinga stencil opening with inturned edges for engagement with the globe of alight bulb held between said socket member and stencil plate, said stJIICll plate having a projecting shank rece-ving hood and a spring insaid hood engageable with the shank of the light bulb to press the sameagainst a lower edge portion of said socket member, the said socketmember having a concave seat receiving the shank thus pressed againstthe same, and the said stencil plate, at a point opposite to said hoodhaving a pocket that loosely receives the tip of the bulb.

5. A'bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being a rigid structure havinga stencil opening with inturned edges for engagement with the globe of alight bulb held between said socket member and stencil plate, the saidstencil plate having a depression adjacent to its stencil openingprovided with drain passages for the purposes set forth.

6. A bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being a rigid structure havinga stencil opening with inturned edges for engagement with the globe of alight bulb held between said socket member and stencil plate, the saidstencil plate, at its lower portion, adjacent to its stencil opening,having a spring tending to raise the bulb from its seat.

7. A bulb stenciling device comprising a socket member and a cooperatingstencil plate pivoted thereto, the latter being. a rigid structurehaving a stencil opening with inturned edges for engagement with theglobe of a light bulb held between said socket member and stencil plate,the said stencil plate, at its lower portion, adjacent to its stencilopening, having a spring tending to raise the bulb from its seat, andthe said stencil plate having further a spring engageable with the shankof the bulb to press the same against the lower edge portion of saidsocket member.

8. In a bulb stenciling device, the combination with a socket member, ofa concave stenciling plate hinged thereto atone side andspring-connected thereto at its intermediate portion, said stencilplate, at its bottom having a plurality of s encil openings withinturned edges for engagement with the bulb and having outward of saidstencil openings, a depressed trough with drain passages for thepurposes set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

OVERTON WINSTON.

Witnessesi CLARA DEMAREs'r, B. G. WHEELER.

